Welcome to Hazrat Ali,
Problem Solving

Welcome to Hazrat Ali, Problem Solving Website “At Hazrat Ali, we provide a platform for aspiring problem solvers and developers to sharpen their coding and algorithmic skills. Whether you’re a beginner or an advanced coder, our wide range of challenges and resources will help you grow. From mastering data structures and algorithms to participating in competitive coding contests, we offer tools and a community that supports your journey in programming. Explore our curated problems, get involved in discussions, and start Solving problems that will elevate your coding expertise. Join us today and start your problem-Solving adventure!”

Recent Articles

Mar 14, 2026 • Leetcode

Ones and Zeroes

A set x is a subset of a set y if all elements of x are also elements of y.

Mar 13, 2026 • Leetcode

Construct Quad Tree

Given a n * n matrix grid of 0's and 1's only. We want to represent grid with a Quad-Tree.

Mar 12, 2026 • Leetcode

House Robber II

You are a professional robber planning to rob houses along a street.

Mar 11, 2026 • Leetcode

Two Sum II - Input Array Is Sorted

Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order,

Mar 10, 2026 • Leetcode

Rotate Function

You are given an integer array nums of length n.

Mar 09, 2026 • Codeforces

New Year and Naming

Happy new year! The year 2020 is also known as Year Gyeongja (경자년, gyeongja-nyeon) in Korea. Where did the name come from?

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